Link and yoke suspended roof



Oct. 10, 1967 L. s. LONGENECKER LINK AND YOKE SUSPENDED ROOF Filed Dec.

Mill

INVENTOR. Lew S. Longenec/rer 2M, 2km 712 14;

H/S ATTORNEYS 1967 L. s. LONGENECKER 3,345,962

LINK AND YoKE SUSPENDED ROOF I Filed Dec. 27, 1965 6 Sheets-Sheet 2 l5d I IS'dEE INVENTOR. Law 5. Lopgenecker 06L 0, 1967 L. s. LONGENECKER 3,345,962

. LINK AND YOKE SUSPENDED ROOF Filed Dec. 27, 1965 6 Sheets-Sheet 5 I20 23 F; g. 4 Fly. 5

,INVENTOR. Levi 8. Longenec/rer Oct. 10, 1967 L. LONGENECKER 3,345,962

LINK AND YOKE SUSPENDED ROOF 6 Sheets-Sheet 4 Filed Dec. 27, 1965 INVENTOR. Levi 5. Longenecker BY H/S ATTORNEYS Oct. 10, 1967 s. LONGENECKER 3,345,962

LINK AND YOKE SUSPENDED ROOF 6 Sheets-Sheet 5 Filed Dec. 27, 1965 Fig. /2

INVENTOR. L ew' .5. Longenecker BY 7. JZ lifz w HIS ATTORNEYS Oct- 10, 196 L. s. LONGENECKER 3,345,962

LINK AND YOKE SUSPENDED ROOF Filed Dec. 27, 1965 6 Sheets-Sheet 6 F I g. /6

Fig. 18 ,Fig. /9

INVENTOR. Law 8. Longenecker HIS A TTORNEYS United States Patent Ofiice 3,345,962 Patented Get. 10, 19%? 3,345,962 LINK AND YOKE SUSPENDED ROOF Levi S. Longenecker, 61 Mayfair Drive, Pittsburgh, Pa. 15228 Filed Dec. 27, 1965, Ser. No. 516,436 23 Claims. (Cl. 110-99) This invention relates to an improved roof assembly or construction of a type in which metal members suspend roof tile or block members a an inner lining for a furnace structure and particularly, to a furnace roof construction which employs an improved type of hanger assembly fors-uspending refractory tile or block members from the overhead beams or superstructure of the furnace.

In my Patent No. 3,115,109 of Dec. 24, 1963, I have disclosed a suspended roof construction which makes use of refractory hangers for direct connection with refractory tile or block members. The present invention deals with a construction in which metal hanger members are used throughout for suspending refractory tile or block members in adjacent aligned rows.

It has been an object of my invention to provide an improved furnace roof or overhead structure and assemy;

Another object of my invention has been to meet factors of difliculty in asembling and suspending a roof construction and particularly, the refractory tile members thereof;

A further object has been to provide an improved roof assembly which is flexible in accomplishing an assembling operation and which enables a positive and strong type of bonded suspension of tile members;

A still further object of my invention has been to devise an improved type of hanger assembly and members therefor which will permit adjustment of the assembly with respect to overhead beam members and will, at the same time, enable refractory tile members to be pivoted into a suspended interlatched relation and will facilitate maintenance and repair of the construction.

' These and other objects of my invention will appear to those skilled in the art from the illustrative embodiments herein described and the drawings.

In the drawings, FIGURE 1 is a top plan fragment of a furnace roof or arch assembly as constructed in accordance with my invention and showing four aligned refractory ti'le member rows in an assembled and suspended relation;

FIGURE 2 is a fragmental side section in elevation on the same scale as and taken along the line IIII of the assembly shown in FIGURE 1;

FIGURE 3 is an end section in elevation taken along the line IIIIII of FIGURE 2 showing further details of the construction and also illustrating how refractory tile or block members of one row may be rotated on a hanger into position with respect to tile members of an adjacent row;

FIGURE 4 is an enlarged end fragment in elevation, particularly illustrating the construction and mounting of a loop hanger and its utilization with a centrally disposed link or primary hanger casting for suspending an intermediate or central row of tile members;

FIGURE 5 is a side fragment in elevation on the same scale as FIGURE 4 and generally showing details of the same parts but taken at right angles to FIGURE 4;

FIGURE 6 is an end fragment in elevationon the scale of FIGURES 4 and 5 and particularly illustrating a bridging hanger casting of my construction;

FIGURE 7 is a top plan view on the same scale as and showing the construction of the bridging hanger of FIG- URE 6;

FIGURE 8 is a side fragment in elevation on the same scale as FIGURE 6, taken at right angles thereto and further illustrating the construction and use of the bridging hanger of such figure;

FIGURE 9 is a fragmental perspective view in elevation of a top portion of a refractory tile or block member of my construction, on the same scale as FIGURES 4 to 8;

FIGURE 10 is a top plan view of the tile member of FIGURE 9 on the same scale as such figure;

FIGURE 11 is a fragmental side view in elevation, showing the same side of the tile member as FIGURE 9 and on the same scale as such figure;

FIGURE 12 is a fragmental end view in elevation, taken at right angles to and on the same scale as FIG- URE 11 of the tile member illustrated in FIGURES 9 to 11, inclusive;

FIGURE 13 is a side view in elevation on the scale of FIGURES 1 to 3, showing details of the construction of a primary or link metal hanger of my invention;

FIGURE 14 is a top plan view on the scale of and of the hanger of FIGURE 13;

FIGURE 15 is an enlarged end View in elevation and partial section also showing the hanger of FIGURES 13 and 14;

FIGURE 16 is a top plan fragment on the scale of FIGURE 1 showing a modified or alternate utilization of bridging or yoke hangers, and particularly illustrating how and by what means the refractory roof may be repaired;

FIGURE 17 is a fragmental side view in elevation on the scale of and of the construction of FIGURE 16 and taken adjacent a side wall of the furnace;

FIGURE 18 is a slightly enlarged side view in elevation on an enlarged scale and showing the use of link and auxiliary or tertiary metal hanger means for a representative pair of replacement tile; and

FIGURE 19 is an elevation taken at right angles to, on the scale of, and further showing the construction of FIGURE 18.

Referring particularly to FIGURES 1, 2 and 3 of the drawings, I have shown primary overhead support I-beam members 10 that are normally full-length, transverse roof members having a spaced-apart relationship with each other and secured in a conventional manner at their ends to provide a longitudinally-extending overhead superstructure. Secondary, spanning, cross, I-beam members 11, as particularly shown in FIGURE 2, are adapted to extend across the spacing between adjacent support beam members 10 and to rest on the upper faces of the lower flanges of such beam members. The secondary beams 11 are carried by and are tiltably or endwise liftable and are slidable as to their spaced-apart relation with each other on the bottom flanges of the primary or support beam members 10.

Metal loop, yoke or main hangers 12 of downwardlyelongated rectangular shape, are suspension or upright hangers that are adapted to be entered endwise on an associated secondary or cross beam 11 and slid therealong to a suitable suspended and spaced apart relation therealong, see particularly FIGURES 2 and 3. Each loop hanger 12 is slidably-suspended from the top flange of an associated secondary or cross beam 11 and, as shown particularly in FIGURES 4 and 5, has a top connecting portion 12a that rests on the top flange of the beam 11, and has opposed, spaced-apart, vertical leg portions that project aiong opposite sides of and retain them on the beam member. The lower portions of the sides or legs of each loop hanger 12 are connected by a cross-extending, connecting portion 12b which, in effect, defines an enclosed loop or rectangle about the beam 11 on which it is mounted. The side legs extend further downwardly below the cross piece or shelf portion 12b and are turned-inwardly to define inwardly-projecting substantially horizontal, end flange, shelf or foot portions 120. The shelf means or portions 120 define a central slot or open portion 12d at their inner ends to bypass web portion a of a link or primary metal hanger 15 in order that its upper flange 16 may slidably rest on the shelf portions (see FIG- URE 4).

Intermediately-positioned refractory-member-supporting, metal hanger castings 15 which may be termed primary or link hanger castings are adapted to be entered endwise into the loop castings 12, as shown particularly in FIGURE 3, to project downwardly therefrom and in longitudinal alignment therealong and with respect to the secondary or cross beam members 11. Each primary metal hanger casting 15 has downwardly-projecting and spacedapart leg and latching foot portions adapted to carry a group of refractory tile members of a row in a suspended relation therefrom and to cooperate endwise with aligned similar metal hangers 15 to support or suspend a complete intermediate or central row, such as row A of FIGURES 1, 3 and 16 of the drawings, in a wide-face, side-by-side, abutting relation with each other.

As shown particularly in FIGURES 13, 14 and 15, each primary or link metal hanger 15 has a substantially planar or flat top flange 16, a downwardly-projecting web portion 15a and a central (lengthwise-extending, reinforced, legconnecting portion 1512. A series or group of leg portions 15c and 15c project vertically-downwardly in a spacedapart relation with each other from the connecting portion 15b and like it, are reinforced. Each leg portion 150 terminates in a reinforced latching foot portion 15d. Opposite end leg portions 15c represent substantially half legs, as compared to the leg portions 150, and terminate in substantially half, latching foot portions 15'd. The foot portions 15d and 15'd are, as shown particularly in FIGURE 3, adapted to latch-engage within opposed latching slots at the upper ends of a pair of adjacent tile mem bers 20 of an associated row, such as A of FIGURE 3. As indicated in FIGURE 3, the tile members 20 may be rotated into and out of a latched-on position with respect to the feet of the hangers 15.

Referring particularly to FIGURES 1, 13 and 14, it will be noted that the top flange 16 of each metal hanger 15 has, at one end, a projecting portion 16a, offset portions 16b, 16c and 16d, and a downwardly-projecting lug or tab lee which cooperate and interfit with somewhat complementary portions 16'a through 16'e of the other end of an adjacent endwise-aligned similar hanger casting 15 of the same line or row of castings 15. This, in effect, enables the hangers 15 to be endwise latched or interfit together fully along an associated row, see FIGURES 1 and 2.

Secondary, yoke or bridging metal casting hangers 17 are adapted to centrally interlatch with the primary hangers 15 and to extend on opposite sides of such hangers to support tile members 20 of adjacent rows, such as rows B and C of FIGURE 3 of the drawings. As shown particularly in FIGURES 3 and 6 to 8, inclusive, each secondary or bridging hanger casting 17 has a centrallyupwardly-offset mounting latching portion 17a whose open latching slot portion 17b is adapted to slidably-latch on the top flange 16 of an associated primary hanger 15, see FIGURES 1 and 2. It is thus apparent that the primary hangers 15 has a suspended, latched relationship within and with respect to the main or loop hangers 12, and that the secondary or bridging hangers 17 have a latched-on positioning with respect to the primary hangers 15 to suspend a group, such as three tile member rows (see A, B and C of FIGURE 3) from and along a longitudinal line of secondary or cross beam members 11.

Each bridging hanger 17 has oppositely-extending, horizontal, bridging or shoulder portions 170 which, at their projecting ends, terminate in vertical leg portions 17d. Each leg portion 17d is provided with a latching foot portion 176 that is adapted to fit within and engage side slots 26 of a pair of wideface, abutting, adjacent tile members 20 of an associated tile member row. As shown particularly in FIGURES 6 and 7, the hanger castings 17 are of a reinforced construction along their shoulder portions 170 and leg portions 17a.

With particular reference to FIGURES 3 to 5 and 9 to 12, inclusive, I have illustrated refractory tile or block members 20 which are used with my hanger assembly, construction or combination to provide adjacent, interlocked, tile member rows. Each tile member 29 has a pair of opposed wide side faces 22 and 22', a substantially planar bottom end face 23, and a configurated top end face 24. Opposed, vertical, narrow end faces 21 and 21' are provided along their lengths with alternate tongue and groove portions for interlatching tile members of one row with adjacent tile members of adjacent rows, see particularly FIGURE 3. In this connection, it will be noted that the tongue and groove portions on one narrow vertical face 21 are vertically-staggered with respect to those on the opposite end face 21', in order to provide a complementary interlock with the adjacent tile members of other rows.

As shown in FIGURES 9 and 11, the wide side face 22 is provided with a V-shaped notch or groove 22a adjacent its upper end portion which serves as a mortar-receiving notch. The opposite side 22 is, on the other hand, shown as fully planar. Adjacent its upper end, each tile member 20 has a pair of similar, centrally-positioned, and horizontally-extending latching slots 26. Each slot 26 is open to an adjacent wide side face, such as 22 or 22', and is also open forwardly along about half its length to the top end face 24.

The upper end of each tile member 20 has an upwardlyprojecting head or pivot abutment portion 27 that terminates substantially intermediate the latching slots 26. As shown particularly in FIGURE 11, the pivot abutment portion 27 has a substantially vertical, lower front face 28 extending from the end face 24, and an upper, backwardly-sloped face 28a. These faces serve, as shown in FIGURE 3, as pivot swing faces for the leg portions of an appropriate hanger. Centrally-disposed and projecting-downwardly along the front faces of the abutment portion 27, is a stop or nose portion 29, that, at its ends, serves as a stop abutment for leg portions of the hangers as their foot portions are being inserted, latched within and removed from the latching notches 26.

In providing a refractory lining for a furnace roof in accordance with my construction, a series of secondary or cross I-beam members 11 are placed to, at their end portions, rest on the bottom flange of the main cross beam members 10. The members 11 extend across the spacing between a pair of the members 10 and in an endaligned and tranversely spaced-apart relation with each other. One end of each secondary beam member 11 may be pivoted on a flange of one main or primary beam member 10, in order to endwise-slide on a requisite number of main or loop hangers 12 on its lifted-up opposite end portion. At this time, the beam 11 may then be lowered to its position shown in FIGURE 2 and the hangers 12 slid therealong to appropriate, spaced positions for supporting the primary and secondary or central link and bridging metal hangers l5 and 17.

Each primary or central hanger 15 is inserted so as to extend between a pair of longitudinally spaced-apart primary or loop hangers 12 (see the hanger 15 at positions G and H of FIGURE 2 of the drawings), so as to support its top flange 16 adjacent its opposite ends on the shelf portions (see also FIGURES 4 and 5 of the drawings). As a result, each metal hanger 15 is suspended by its top flange 16 in an endwise-extending relation, substantially parallel to an endwise-alikned group of secondary or cross beam members 11 by a pair of spacedapart main or loop hangers 12.

Although for the purpose of illustration, I have shown the secondary or bridging hangers 17 as latch-engaging with immediately succeeding tile members of the same row, if desired, the hangers may be latch-engaged only with alternate tile members of the tile rows. For example, in FIGURE 2 the hanger 11 between hangers a and c may be omitted, thus giving a wider spacing between the bridging hangers. In this manner, the hangers 17 may be used between every other tile member along a given row (see FIGURE 16).

The bridging hangers 17 are placed to extend across an associated primary hanger 1'5 with their central oifset portions 17a slidably-resting on the top flanges 16, as accomplished by the engagement of the inwardly-recessed portion 17b of each hanger 17 therewith. As shown in FIGURE 2, the bridging hangers 17 have a spaced relation with each other along an associate hanger 15 that corresponds to the number of refractory tile members 20 that are to be carried in a tile member row, such as row B of FIGURE 3.

Starting at one end or side of the furnace, the tile members 20 may be built-up in a longitudinal row by pivoting them on associated foot portions of associated primary or secondary hangers to fonn a complete tile row. The succeeding tile rows may be pivoted into position on associated foot portions of associated hangers to provide adjacent tile rows in which the tongue and groove narrow faces of one tile member row have a complementary interfitting, latching relation with narrow end faces of the tile members of adjacent rows.

It will be noted that my construction not only facilitates the original installation of a furnace lining, but also facilitates repair and maintenance from the standpoint of replacing burnt-out or damaged tile members or rows 20. As customary in an installation of this type, suitable plastic filler blocks, such as 31 (see FIGURE 2), may be employed in appropriate places, and mortar or clay sealing cement may be used to fill-up any crevices or expansion joints as well as notches, such as the V-shaped notches 22a, so as to provide a fully bonded and sealed-off lining for the furnace.

In FIGURES 16 and 17, I have illustrated that the bridging or yoke hangers 17 may be used alternately with respect to and for supporting tile members of outer rows of a three row group, such as rows B and C. They also illustrate how tile member rows may be assembled with respect to a refractory side wall of the furnace. FIGURES 16 to 19, inclusive, further and importantly illustrate how and by what means the replacement of burnt-out or damaged tile members may be accomplished.

As shown particularly in FIGURE 17, an end tile member 20' may be provided with a backwardly or inwardlyoifset upper ledge portion 22b along one of its wide side faces, such as 22, to receive sealing-01f mortar. Refractory side wall 32 is provided with a ledge portion 32a to support a refractory filler block 31 which abuts against the lower remaining wide side portion of the end tile 211'. Mortar or other suitable cementitious material may be applied between the joints to fill up the spacing between the side wall 32, the filler block 31 and the end tile 20'. It will be noted that the end tile 20' overlaps the ledge 32a of the side wall 32 and that the filler tile 32 rests thereon.

By way of illustration if, for example, one or more tile members of the central tile row A in FIGURE 6 is to be replaced, such as the tile member d, then edgewise-opposite, overlapping or staggered tile members 2, e and f, f' of adjacent or outer rows B and C of the same three row group are removed. This will enable a replacement tile member if to be pivoted into position as shown in FIG- .URE 3. To replace the two pairs of tile members of adjacent rows 1B and C, it is only necessary to take a pair of typical tile members 20, such as shown in FIGURES 4 and 5, and cut-away, remove or smooth-off the tongue and groove portions along their narrow end faces 21 and 21', and assemble them as a pair on an auxiliary or tertiary metal hanger or casting 35. It will be noted that the metal hanger 35 has an extending, reinforced upper arm or shoulder portion 35a which terminates at its ends in a pair of toe or support portions 351). Each hanger 35 also has a downwardly-projecting reinforced leg portion 36, a transverse foot portion 37, and a pair of downwardlyprojecting lug or toe portions 37a.

The foot portion 37 and the toe portions 37a of each hanger 35 are, as shown particularly in FIGURES 18 and 19, adapted to fit within cooperating latching slots 26 of tile members e and e in a latching relation with their abutment or head portions 27. If desired, a metal link or clamp 40 may be provided for holding a pair of tile members e, e or f, 1" together in an assembled relation on the hanger 35 until they are inserted in a filling position within the assembly of a row, such as row B or row C of FIGURE 16. It will be noted that each link 40 is of downwardly-inverted U-shape and has a top arm portion that is adapted to extend across in abutment with top faces of the pair, of tile members; it also has downwardly-projecting foot or lug portions 4041 at its ends which flexiblyabut with or clamp-engage against the back Wall of each latching slot 26. When a pair of tile members is thus assembled in the manner shown in FIGURES 18 and 19, it may then be lowered into position within the appropriate tile member row until the toe or support portions 35b of the auxiliary hanger 35 rest on the top face of the head portion 27 of adjacent tile members of the same row. As a result, the replaced pair of tile members of a particular row, such as the members e and e of row B, are supported by resting on adjacent aligned tile members of the same row by means of the auxiliary hanger 35. It will be apparent that it is not necessary to replace the yoke orbridging hanger 17 for the tile members e, e and f, f after a patching job has been accomplished.

Although I prefer to employ the tile members in adjacent rows A, B and C in an endwise-overlapping or staggered relation with respect to each other to obtain a better bonded relation and to, if desired, use the bridging hangers 17 (as shown in FIGURE 16) for alternative groups of tile members in a given row (such as in rows B and C) and as contrasted to immediately successive tile groups of FIGURE 1, it will be apparent that the tile members of adjacent rows may also be employed in an edge or endwise-aligned relation with each other. In the latter event, it is only necessary to remove one of a pair of adjacent tile members in rows B and C to permit the replacement of a tile member d of a central row; the bridging hanger 17 for such tile members may also be replaced by the hangers 35.

As shown in FIGURE 2, I may use right and left hand oflsets 22b in end tile members 20' of adjacent rows to provide expansion joints. FIGURE 2 shows that groups of tile members carried by one or more link hangers of a given row, such as row A, may provide suitable expansion joints. Insulation, mortar, etc. may be used to fill such joints. Stability is assured in the installation by only providing for pivot-mounting of the tile members of the central row A on their hangers 15 and providing a nonpivot mounting of the tile members of the adjacent rows B and C on the feet of their hangers 17. Where in patching, the tongue and groove portions of the tile of one row do not complement the tile of an adjacent row, the grooves may be filled with mortar in a manner such as shown in FIGURE 14 of my Patent No. 3,115,109.

FIGURE 2 also illustrates that the primary hangers 15 are suspended in a spaced relation below the beams 11 by at least a pair of loop hangers 12 to extend across beneath the bottom flange of a main beam 10. On the other hand, the secondary hangers 17 rest on the hangers 15 to extend in the direction of the beams 10 and across the beams 11. This not only provides a support structure of maximum strength, but also assures air-space protection of the beams 11 and 12 from the heat of the furnace and, as imparted to the tile members.

While I have shown particular embodiments of my inveniton for the purpose of illustrating its novel features, it will be apparent to those skilled in the art that various modifications and changes may be made without departing from its spirit and scope.

I claim:

1. In a furnace roof employing spaced-apart support beams, a group of cross beams carried by the support beams and endwise liftable with respect thereto, and metal loop hangers insertable endwise on the cross beams to project downwardly therefrom, an improved suspension construction wherein, each loop hanger has shelf means adjacent its lower end, primary metal hangers are provided having a top flange therealong adapted to slidablyenter an associated loop hanger and rest in a suspended relation on said shelf means thereof, and each primary hanger has downwardly-projecting and spaced-apart leg and latching foot portions therealong.

2. In a furnace roof as defined in claim 1 wherein, each loop hanger has a central open portion through said shelf means, and each primary hanger has a web projecting downwardly from its said top flange to carry said leg and latching foot portions, and said web is adapted to be entered along the central open portion of said shelf means of an associated loop hanger to project downwardly therefrom.

3. In a furnace roof as defined in claim 1 wherein, bridging metal hangers are provided and each has an upper bridging arm, said bridging arm has a central latching portion to slidably-fit on said top flange of an associated one of the primary hangers to project at right angles thereto, and said bridging arm ha spaced-apart downwardly-projecting leg and latching foot portions.

4. In a furnace roof as defined in claim 1 wherein, each of said primary metal hangers is carried by at least pair of the loop hangers, and said primary metal hangers are carried along an endwise-aligned row of the cross beams by said loop hangers as a row in which at least one primary metal hanger extends across beneath at least one of the support beams and one end portion of said one hanger is carried by a loop hanger on one of the cross beams and the other end portion of said one hanger is carried by a second loop hanger on an endwise-adjacent cross beam of the same row.

5. In a furnace roof as defined in claim 1 wherein, said shelf means is defined 'by a pair of inwardly-projecting lower end portions of each loop hanger, said inwardly-projecting end portions terminate in a spaced relation with each other, and said primary hangers have a web projecting centrally-downwardly from said top flange to carry said leg and latching foot portions therealong, and said web is adapted to slide endwise along the spacing between said pair of inwardly-projecting lower end portions.

6. In a furnace roof as defined in claim 1 wherein said shelf means is defined by a pair of inwardly-projecting lower end portions of each loop hanger, said inwardlyprojecting end portions terminate in a space relation with each other, said primary hangers have a web projecting centrally-downwardly from said top flange to carry said leg and latching foot portions therealong, said web is adapted to slide endwise along the spacing between said pair of inwardly-projecting lower end portions, and each of the loop hangers has a cross-connecting portion spaced above said pair of inwardly-projecting end portions to define an upper loop for each of said loop hangers and confine said top flange of an associated primary hanger therebelow.

7. In a furnace roof as defined in claim ll, wherein metal bridging hangers are provided for suspension from associated primary hangers, each said bridging hanger has a top extending arm provided with a central latching portion to slidably-centrally fit on said top flange of an associated primary hanger to project from opposite sides thereof, and leg and latching foot portions project downwardly from opposite ends of said top extending arm of each of said bridging hangers.

8. In a furnace roof as defined in claim 1, wherein refractory tile members are provided having latching slot portions along their wide side faces adjacent their upper ends, said tile members are positioned with their wide side faces in an opposed relation to define a tile member row, and the latching foot portions of said primary hangers are adapted to pivot in and out of engagement within cooperating latching slot portions of adjacent pairs of tile member of the row.

9. In a furnace roof as defined in claim 1 wherein said primary metal hangers have complementary aligning portions at their opposite ends whereby they may be endwise-aligned in a suspended relation from the loop hangers along a longitudinal row of the cross beams.

It). In a furnace roof as defined in claim 1, wherein said primary metal hangers have complementary aligning portions at their opposite ends whereby they may be endwise-aligned in a suspended relation from the loop hangers along a longitudinal row of the cross beams, refractory tile members are provided having latching slot portions adjacent their upper ends, and the latching foot portions of the longitudinal row of said primary hangers are adapted to engage within the latching slot portions of said refractory tile members to suspend said tile members in an abutting relationship with each other along the longitudinal row of cross beams to define a refractory row in a suspended relation therewith.

11, In a furnace roof as defined in claim 1, wherein bridging metal hangers are provided and each has an upper bridging arm adapted to slidably-rest on and extend across an associated primary hanger, each of said bridging metal hangers has downwardly-projecting leg and latching foot portions adjacent its opposite ends, a group of cross beams are endwise-aligned to define a longitudinal row, a group of the loop hangers are positioned in a spaced relation along the cross beams of said longitudinal row, a group of the primary hangers are suspended in an endwise-aligned relation with each other by said group of loop hangers along the longitudinal row of cross beams, and said bridging metal hangers are positioned in a spaced-apart relation along said group of primary metal hangers to define adjacent longitudinal side rows along the longitudinal row of cross beams.

12. In a furnace roof as defined in claim 1, wherein bridging metal hangers are provided and each has an upper bridging arm adapted to slidably-rest on and extend across as associated primary hanger, each of said bridging hangers has downwardly-projecting leg and latching foot portions adjacent its opposite ends, a group of cross beams are endwise-aligned to define a longitudinal row, a group of the loop hangers are positioned in a spaced relation along the cross beams of said longitudinal row, a group of said primary hangers are suspended in an endwise-aligned relation with each other by said group of loop hangers along the longitudinal row of cross beams, said bridging hangers are positioned in a spaced-apart relation along said group of primary hangers to define adjacent longitudinal side rows along said longitudinal row of cross beams; refractory tile members are provided, each of which has latching slot portions on opposed wide side faces adjacent its upper end; a group of said tile members is positioned with their wide faces in an abutting relation along the longitudinal row defined by said group of loop hangers and with their latching slot portions in engagement with said latching foot portions of the loop hangers of said row to provide an intermediate row of refractory members along said longitudinal row of beam members, additional groups of said tile members are aligned along the adjacent 1ongitudinal rows defined by said bridging hangers with the wide faces of each refractory member group of each row in an abutting relation with their latching slot portions in latching engagement with said latching foot portions of said bridging hangers to provide adjacent longitudinal rows of refractory members along said intermediate row.

13. In a furnace roof as defined in claim 11 wherein the tile members of said adjacent longitudinal rows have a staggered relation With the tile members of said intermediate row.

14. In a furnace roof as defined in claim 11 wherein the latching feet of said primary hangers have means constructed to pivot the refractory tile members of said intermediate row into and out of latching engagement with their latching slot portions, and the latching feet of said bridging hangers have means constructed for sidewise non-pivoting insertion into and out of latching engagement within the latching slot portions of the adjacent longitudinal rows of tile members.

15. In a furnace roof as defined in claim 11 wherein said refractory tile members have opposed narrow side faces provided with latching tongue and groove portions therealong that have a complementary interfitting latching engagement with narrow side faces of tile members of rows adjacent thereto.

16. In a furnace roof as defined in claim 11 wherein, said refractory tile membens of said intermediate and adjacent tile member rows have opposed narrow side faces provided with latching tongue and groove portions therealong that have a complementary interfitting latching engagement with narrow side faces of tile members of rows adjacent thereto, the tile members of the adjacent longitudinal rows are in a staggered relation with respect to tile members of the intermediate row, and the latching feet portions of said bridging metal hangers are in engagement within the latching slot portions of alternate pairs of tile members of said adjacent longitudinal rows.

17. In a furnace roof as defined in claim ll wherein, each of said refractory tile members has a head portion projecting above and along about half the distance of its said latching slot portions to provide an abutment for aligning the leg portions of the hangers, and each of said tile members has a portion projecting from said head portion and positioned to guide the leg portions of the hanger members into said latching slot portions and provide abutment means for said leg portions when said latching foot portions are in latching engagement with said latching slot portions of an associated tile member.

1'8. In a furnace roof as defined in claim 11 wherein, at least one auxiliary metal hanger is provided, said auxiliary hanger has an upper cross-extending arm terminating in toe end portions, said auxiliary hanger has a centrallydownwardly-extending leg portion and a latching foot portion on the end of said leg portion, a pair of tile members of at least one adjacent longitudinal row have their latching slot portions in complementary alignment and in latching engagement on the foot portion of said auxiliary hanger, and said toe end portions of said auxiliary hanger rest on top faces of tile members of the same row that are adjacent to said pair of tile members to support said pair thereon.

'19. In a furnace roof as defined in claim 18 wherein, an inverted U-shaped metal clip has an arm portion which extends across in abutment with upper faces of said pair of tile members, and said clip has downwardly-projecting lug portions at opposite ends of said arm portion that flexibly latch-engage the latching slot portions of said pair of tile members to hold them in a wide face abutting position in latching engagement on the latching foot portion of said auxiliary hanger.

20. In a furnace roof employing spaced-apart support beams, a group of cross beams slidably-carried by and en-dwise-liftable with respect to the support beams, metal loop hangers carried by the cross beams and insertableendwise thereon, and primary metal hangers carried adjacent their opposite ends by the loop hangers; an improved suspension construction in which, each loop hanger has an inner slotted shelf means adjacent its lower end for slidably-endwise-receiving an associated primary hanger, and each primary hanger has a top flange adapted to rest on said shelf means and has a downwardly-projecting web provided with spaced-apart leg and latching foot portions there-along.

21. In a furnace roof as defined in claim 20 in which, a group of the cross beams are positioned in an endwisealigned relation on the support beams, a group of the loop hangers are positioned in a space-d apart relation along said group of endwise-aligned cross beams, and a group of the primary hangers are positioned in an endwise aligned relation with respect to each other along said group of loop hangers to define a longitudinal row.

22. In a furnace roof as defined in claim 21 in which, bridging hangers are provided; each of said bridging hangers has a cross arm, spaced-apart downwardly-projecting leg and latching foot portions on said cross arm, and means for slidably positioning said cross arm on an associated primary hanger to extend thereacross; and a group of said bridging hangers are positioned in a spaced-apart relation along said group of primary hangers in such a manner that the leg and latching foot portions of said group of bridging hangers define adjacent longitudinal rows along the longitudinal row defined by said primary hangers.

'23. In a furnace roof as defined in claim 22 in which, refractory tile members are provided; each of said tile members has a pair of opposed wide side faces and a pair of opposed narrow end faces, and latching slot portions are provided in said wide side faces adjacent and open to a top end face; a group of said tile members is positioned with their wide side faces in abutment with each other and with their latching slot portions engaged by the latching foot portions of said longitudinal group of primary hangers to define a tile member row therealong, and groups of said tile members are positioned with their wide side faces in abutment with each other as longitudinal rows in alignment with said adjacent longitudinal rows and with their latching slot portions engaged by the latching foot portions of said group of bridging hangers to define adjacent tile member rows along said first-mentioned tile member row.

References Cited UNITED STATES PATENTS 2,664,837 1/1954 Banck --99 3,115,109 12/ 1963 Langenecker l1099 3,162,151 12/1964 Roudabush 110-99 3,260,228 7/ 1966 I Lingl 1l099 FREDERICK KETIERER, Primary Examiner UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,345,962 October 10, 1967 Levi S. Longenecker It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, line 26, for "asembling" read assembling column 4, line 72, for "endwise-alikned" read endwise aligned column 7, line 36, before "pair" insert a column 8, line 11, for "member" read members line 49, for "as" read an line 74, after "relation" insert and Signed and sealed this 15th day of October 1968.

(SEAL) Attest:

EDWARD J. BRENNER Commissioner of Patents Edward M. Fletcher, Jr.

Attesting Officer 

1. IN A FURNACE ROOF EMPLOYING SPACED-APART SUPPORT BEAMS, A GROUP OF CROSS BEAMS CARRIED BY THE SUPPORT BEAMS AND ENDWISE LIFTABLE WITH RESPECT THERETO, AND METAL LOOP HANGERS INSERTABLE ENDWISE ON THE CROSS BEAMS TO PROJECT DOWNWARDLY THEREFROM, AN IMPROVED SUSPENSION CONSTRUCTION WHEREIN, EACH LOOP HANGER HAS SHELF MEANS ADJACENT ITS LOWER END, PRIMARY METAL HANGER ARE PROVIDED HAVING A TOP FLANGE THEREALONG ADAPTED TO SLIDABLYENTER AN ASSOCIATED LOOP HANGER AND REST IN A SUSPENDED RELATION ON SAID SHELF MEANS THEREOF, AND EACH PRIMARY HANGER HAS DOWNWARDLY-PROJECTING AND SPACED-APART LEG AND LATCHING FOOT PORTINS THEREALONG. 